Wanted to hop in to say "read the small print, and pay attention!"
My aunt funded the Virginia pre-paid plan for all 4 of her nieces and nephews, and at the time when she opened the accounts (around 20 years ago) the promise was "full tuition in the state of VA, or the equivalent amount of you go elsewhere." Somewhere along the way, that changed to "if you go elsewhere, you get a pre-determined rate of return", which is way, way less than the market changed over that time -- it would've been much better to just put it into index funds. Since she was a poorly-paid high-school teacher all along, she was particularly pissed!